Sea of Silver Light by Tad Williams (Otherland #4)

A group of adventurers searching for a cure for comatose children find themselves trapped in a sequence of virtual worlds, the only opponents of a conspiracy of the rich to live forever in a dream. Now, they are forced to make an uneasy alliance with their only surviving former enemy against his treacherous sidekick Johnny Wulgaru, a serial killer with a chance to play God forever. Few science fiction sagas have achieved the level of critical acclaim-and best-selling popularity-as Tad Williams's Otherland novels. A brilliant blend of science fiction, fantasy, and technothriller, it is a rich, multilayered epic of future possibilities.

Tad Williams has held more jobs than any sane person should admit tosinging in a band, selling shoes, managing a financial institution, throwing newspapers, and designing military manuals, to name just a few. He also hosted a syndicated radio show for ten years, worked in theater and television production, taught both grade-school and college classes, and worked in multimedia for a major computer firm. He is cofounder of an interactive television company, and is currently writing comic books and film and television scripts as well. Tad and his family live in London and the San Francisco Bay Area.

Publishers Weekly

Characters dead in real life can still be alive in the virtual world, as in the poignant plight of a young woman, whose dress and manners are 18th century, who's in love with a young man snatched, apparently, from the trenches of WWI.